dispatch_source_set_timer(timer, start, interval, 0.1 * NSEC_PER_SEC);
Looking back, Mavericks was the bridge between the classic OS X era and the modern macOS era we know today. It laid the groundwork for the flat design language that would arrive in Yosemite the following year, but it retained the skeuomorphic charm of the old world. mavericks osx
Mavericks is remembered as the "stability" release. It refined the bridge between the mobile world (iOS) and the desktop world (OS X) without sacrificing the power that Mac users expected. By making it free, Apple ensured that the vast majority of its user base moved to the latest security standards and features simultaneously, ending the era of fragmented OS versions on the Mac platform. dispatch_source_set_timer(timer, start, interval, 0